# Nuxt Content Narrator

A Nuxt layer that provides text-to-speech narration capabilities for Nuxt Content pages.

[![Watch the video](nuxt-content-narrator-demo.gif)](https://youtu.be/mnMiOrf9kz4)

[Watch the video with audio on YouTube](https://youtu.be/mnMiOrf9kz4)

## Quick Start

1. Install the layer and extend it

```bash
npm i nuxt-content-narrator
```

```typescript
// nuxt.config.ts
extends: ["nuxt-content-narrator"],
```

2. Get your [ElevanLabs](http://elevenlabs.io/) API key and set as an environment variable

   ```
   NUXT_ELEVENLABS_API_KEY=sk_xxx
   ```

3. Add the NcNarrator components to your content pages

```html
<script setup lang="ts">
  const route = useRoute();

  const { data: story } = await useAsyncData(() =>
    queryCollection("stories")
      .path(route.path.toString() ?? "")
      .first()
  );
</script>

<template>
  <article class="prose prose-lg mx-auto">
    <NcNarratorService
      v-if="story"
      :collection-item="story"
      voiceId="FGY2WhTYpPnrIDTdsKH5"
    >
      <NcNarratorPlayer progressClass="bg-gray-900" />
      <NcNarratorDevTools />
      <NcNarratorFollowAlongRenderer
        highlightClass="bg-gray-900"
        highlightTextClass="text-white"
      />
    </NcNarratorService>
  </article>
</template>
```

## Components Overview

### 1. NcNarratorService

The core service component that manages the text-to-speech functionality and state.

**Props:**

- `collectionItem`: (Required) A Nuxt Content page collection item that includes the `rawbody` property ([read more about rawbody here](https://content.nuxt.com/docs/advanced/raw-content))
- `voiceId`: (Optional) The ID of the ElevenLabs voice to use for narration (Visit https://elevenlabs.io/app/voice-lab to browse all Elevan labs voices, click "View" button, and get the voiceId from the url )

**Features:**

- Manages audio playback state
- Handles audio generation through ElevenLabs API

### 2. NcNarratorPlayer

A customizable audio player component that provides playback controls.

**Props:**

- `progressClass`: (Optional) CSS class for the progress bar (default: "bg-slate-900")

**Features:**

- Play/pause controls
- Progress bar with current time and duration
- Slot-based API for custom player UI

**Customize with Default Slot**

```html
<NcNarratorPlayer
  v-slot="{ 
    play, // function to play the audio
    pause, // function to pause the audio
    toggle, // function to toggle the audio
    playing, // boolean to check if the audio is playing
    currentTime, // number to get the current time of the audio
    duration, // number to get the duration of the audio
    percentComplete // number to get the percent complete of the audio
  }"
>
  <!-- Your custom player UI -->
</NcNarratorPlayer>
```

### 3. NcNarratorFollowAlongRenderer

An optional component that renders text with synchronized highlighting during audio playback. If you don't need synchronized highlighting, you can use the regular Nuxt Content <ContentRenderer /> component.

**Props:**

- `highlightClass`: (Optional) CSS class for the highlight background (default: "bg-slate-900")
- `highlightTextClass`: (Optional) CSS class for the highlighted text (default: "text-white")

**Features:**

- Word-by-word text highlighting synchronized with audio
- Handles complex HTML content
- Preserves original markup structure
- Smart handling of code blocks and special tags

### 4. NcNarratorDevTools

Development tools component for audio generation in development.

```html
<!-- 
 Only visible in development mode 
 Displays a button to generate audio for the current page
 -->
<NcNarratorDevTools />
```

## Usage

1. Wrap your content with the `NcNarratorService`:

```html
<template>
  <NcNarratorService :collection-item="page">
    <!-- Your content and other narrator components -->
  </NcNarratorService>
</template>
```

2. Add the player component:

```html
<template>
  <NcNarratorService :collection-item="page">
    <NcNarratorPlayer />
    <!-- Your content -->
  </NcNarratorService>
</template>
```

3. Use the follow-along renderer for synchronized text highlighting:

```html
<template>
  <NcNarratorService :collection-item="page">
    <NcNarratorPlayer />
    <NcNarratorFollowAlongRenderer />

    <!-- 
     or if you only need the audio and not the highlighting use the regular
    Nuxt Content <ContentRenderer/> copmonent
    -->
  </NcNarratorService>
</template>
```

## Requirements

- Nuxt Content module
- ElevenLabs API Key

## Styling

The components come with minimal default styling and can be customized using the following:

- Custom CSS classes through props
- Tailwind CSS

## Development

To help contribute to the project, you can clone the repo and install the layer by pointing your `extends` to the local path from another Nuxt project.

```typescript
// nuxt.config.ts
extends: ["../../nuxt-content-narrator"],
```

## Deploying to Production

Just like your content, the audio is stored in the github repo. It is generated with the button in the `NcNarratorDevTools` component and stored in the `audio` folder.